X-Git-Url: http://git.shadowcat.co.uk/gitweb/gitweb.cgi?a=blobdiff_plain;f=lib%2FClass%2FMOP.pm;h=cd7dc7110a5f341a8569bf69c8a312b63d62cfa0;hb=9457b59678c67b47f31e82d284ed57c10d7fc091;hp=85a5a2345b86ebefff04910374127d853f53370a;hpb=62781d9f3fce2443e2930a70b86902135f3ca625;p=gitmo%2FClass-MOP.git diff --git a/lib/Class/MOP.pm b/lib/Class/MOP.pm index 85a5a23..cd7dc71 100644 --- a/lib/Class/MOP.pm +++ b/lib/Class/MOP.pm @@ -4,11 +4,34 @@ package Class::MOP; use strict; use warnings; +use 5.008; + use MRO::Compat; use Carp 'confess'; use Scalar::Util 'weaken'; +use Sub::Identify 'get_code_info'; + +BEGIN { + local $@; + eval { + require Sub::Name; + Sub::Name->import(qw(subname)); + 1 + } or eval 'sub subname { $_[1] }'; + + # this is either part of core or set up appropriately by MRO::Compat + *check_package_cache_flag = \&mro::get_pkg_gen; + + eval { + require Devel::GlobalDestruction; + Devel::GlobalDestruction->import("in_global_destruction"); + 1; + } or *in_global_destruction = sub () { !1 }; +} + + use Class::MOP::Class; use Class::MOP::Attribute; use Class::MOP::Method; @@ -16,85 +39,33 @@ use Class::MOP::Method; use Class::MOP::Immutable; BEGIN { - our $VERSION = '0.58'; - our $AUTHORITY = 'cpan:STEVAN'; - *IS_RUNNING_ON_5_10 = ($] < 5.009_005) ? sub () { 0 } : sub () { 1 }; - # NOTE: - # we may not use this yet, but once - # the get_code_info XS gets merged - # upstream to it, we will always use - # it. But for now it is just kinda - # extra overhead. - # - SL - require Sub::Identify; - - # stash these for a sec, and see how things go - my $_PP_subname = sub { $_[1] }; - my $_PP_get_code_info = \&Sub::Identify::get_code_info; + *HAVE_ISAREV = defined(&mro::get_isarev) + ? sub () { 1 } + : sub () { 1 }; +} + +our $VERSION = '0.64_06'; +our $XS_VERSION = $VERSION; +$VERSION = eval $VERSION; +our $AUTHORITY = 'cpan:STEVAN'; - if ($ENV{CLASS_MOP_NO_XS}) { - # NOTE: - # this is if you really want things - # to be slow, then you can force the - # no-XS rule this way, otherwise we - # make an effort to load as much of - # the XS as possible. - # - SL - no warnings 'prototype', 'redefine'; - - unless (IS_RUNNING_ON_5_10()) { - # get this from MRO::Compat ... - *check_package_cache_flag = \&MRO::Compat::__get_pkg_gen_pp; - } - else { - # NOTE: - # but if we are running 5.10 - # there is no need to use the - # Pure Perl version since we - # can use the built in mro - # version instead. - # - SL - *check_package_cache_flag = \&mro::get_pkg_gen; - } - # our own version of Sub::Name - *subname = $_PP_subname; - # and the Sub::Identify version of the get_code_info - *get_code_info = $_PP_get_code_info; - } - else { - # now try our best to get as much - # of the XS loaded as possible - { - local $@; - eval { - require XSLoader; - XSLoader::load( 'Class::MOP', $VERSION ); - }; - die $@ if $@ && $@ !~ /object version|loadable object/; - - # okay, so the XS failed to load, so - # use the pure perl one instead. - *get_code_info = $_PP_get_code_info if $@; - } - - # get it from MRO::Compat - *check_package_cache_flag = \&mro::get_pkg_gen; - - # now try and load the Sub::Name - # module and use that as a means - # for naming our CVs, if not, we - # use the workaround instead. - if ( eval { require Sub::Name } ) { - *subname = \&Sub::Name::subname; - } - else { - *subname = $_PP_subname; - } - } +# after that everything is loaded, if we're allowed try to load faster XS +# versions of various things +unless ($ENV{CLASS_MOP_NO_XS}) { + my $e = do { + local $@; + eval { + require XSLoader; + __PACKAGE__->XSLoader::load($XS_VERSION); + }; + $@; + }; + + die $e if $e && $e !~ /object version|loadable object/; } { @@ -124,29 +95,65 @@ BEGIN { sub load_class { my $class = shift; - # see if this is already - # loaded in the symbol table - return 1 if is_class_loaded($class); - # otherwise require it ... - my $file = $class . '.pm'; - $file =~ s{::}{/}g; - eval { CORE::require($file) }; - confess "Could not load class ($class) because : $@" if $@; + + if (ref($class) || !defined($class) || !length($class)) { + my $display = defined($class) ? $class : 'undef'; + confess "Invalid class name ($display)"; + } + + # if the class is not already loaded in the symbol table.. + unless (is_class_loaded($class)) { + # require it + my $file = $class . '.pm'; + $file =~ s{::}{/}g; + my $e = do { local $@; eval { require($file) }; $@ }; + confess "Could not load class ($class) because : $e" if $e; + } + + # initialize a metaclass if necessary unless (does_metaclass_exist($class)) { - eval { Class::MOP::Class->initialize($class) }; - confess "Could not initialize class ($class) because : $@" if $@; + my $e = do { local $@; eval { Class::MOP::Class->initialize($class) }; $@ }; + confess "Could not initialize class ($class) because : $e" if $e; } - 1; # return true if it worked + + return get_metaclass_by_name($class) if defined wantarray; } sub is_class_loaded { my $class = shift; - no strict 'refs'; - return 1 if defined ${"${class}::VERSION"} || defined @{"${class}::ISA"}; - foreach my $symbol (keys %{"${class}::"}) { - next if substr($symbol, -2, 2) eq '::'; - return 1 if defined &{"${class}::${symbol}"}; + + return 0 if ref($class) || !defined($class) || !length($class); + + # walk the symbol table tree to avoid autovififying + # \*{${main::}{"Foo::"}} == \*main::Foo:: + + my $pack = \*::; + foreach my $part (split('::', $class)) { + return 0 unless exists ${$$pack}{"${part}::"}; + $pack = \*{${$$pack}{"${part}::"}}; } + + # check for $VERSION or @ISA + return 1 if exists ${$$pack}{VERSION} + && defined *{${$$pack}{VERSION}}{SCALAR}; + return 1 if exists ${$$pack}{ISA} + && defined *{${$$pack}{ISA}}{ARRAY}; + + # check for any method + foreach ( keys %{$$pack} ) { + next if substr($_, -2, 2) eq '::'; + + my $glob = ${$$pack}{$_} || next; + + # constant subs + if ( IS_RUNNING_ON_5_10 ) { + return 1 if ref $glob eq 'SCALAR'; + } + + return 1 if defined *{$glob}{CODE}; + } + + # fail return 0; } @@ -179,7 +186,7 @@ sub is_class_loaded { ## Class::MOP::Package Class::MOP::Package->meta->add_attribute( - Class::MOP::Attribute->new('$!package' => ( + Class::MOP::Attribute->new('package' => ( reader => { # NOTE: we need to do this in order # for the instance meta-object to @@ -189,12 +196,11 @@ Class::MOP::Package->meta->add_attribute( # rather than re-produce it here 'name' => \&Class::MOP::Package::name }, - init_arg => 'package', )) ); Class::MOP::Package->meta->add_attribute( - Class::MOP::Attribute->new('%!namespace' => ( + Class::MOP::Attribute->new('namespace' => ( reader => { # NOTE: # we just alias the original method @@ -206,15 +212,6 @@ Class::MOP::Package->meta->add_attribute( )) ); -# NOTE: -# use the metaclass to construct the meta-package -# which is a superclass of the metaclass itself :P -Class::MOP::Package->meta->add_method('initialize' => sub { - my $class = shift; - my $package_name = shift; - $class->meta->new_object('package' => $package_name, @_); -}); - ## -------------------------------------------------------- ## Class::MOP::Module @@ -229,7 +226,7 @@ Class::MOP::Package->meta->add_method('initialize' => sub { # the metaclass, isn't abstraction great :) Class::MOP::Module->meta->add_attribute( - Class::MOP::Attribute->new('$!version' => ( + Class::MOP::Attribute->new('version' => ( reader => { # NOTE: # we just alias the original method @@ -248,7 +245,7 @@ Class::MOP::Module->meta->add_attribute( # well. Class::MOP::Module->meta->add_attribute( - Class::MOP::Attribute->new('$!authority' => ( + Class::MOP::Attribute->new('authority' => ( reader => { # NOTE: # we just alias the original method @@ -264,7 +261,7 @@ Class::MOP::Module->meta->add_attribute( ## Class::MOP::Class Class::MOP::Class->meta->add_attribute( - Class::MOP::Attribute->new('%!attributes' => ( + Class::MOP::Attribute->new('attributes' => ( reader => { # NOTE: we need to do this in order # for the instance meta-object to @@ -274,14 +271,12 @@ Class::MOP::Class->meta->add_attribute( # rather than re-produce it here 'get_attribute_map' => \&Class::MOP::Class::get_attribute_map }, - init_arg => 'attributes', default => sub { {} } )) ); Class::MOP::Class->meta->add_attribute( - Class::MOP::Attribute->new('%!methods' => ( - init_arg => 'methods', + Class::MOP::Attribute->new('methods' => ( reader => { # NOTE: # we just alias the original method @@ -293,7 +288,7 @@ Class::MOP::Class->meta->add_attribute( ); Class::MOP::Class->meta->add_attribute( - Class::MOP::Attribute->new('@!superclasses' => ( + Class::MOP::Attribute->new('superclasses' => ( accessor => { # NOTE: # we just alias the original method @@ -306,33 +301,31 @@ Class::MOP::Class->meta->add_attribute( ); Class::MOP::Class->meta->add_attribute( - Class::MOP::Attribute->new('$!attribute_metaclass' => ( + Class::MOP::Attribute->new('attribute_metaclass' => ( reader => { # NOTE: # we just alias the original method # rather than re-produce it here 'attribute_metaclass' => \&Class::MOP::Class::attribute_metaclass }, - init_arg => 'attribute_metaclass', default => 'Class::MOP::Attribute', )) ); Class::MOP::Class->meta->add_attribute( - Class::MOP::Attribute->new('$!method_metaclass' => ( + Class::MOP::Attribute->new('method_metaclass' => ( reader => { # NOTE: # we just alias the original method # rather than re-produce it here 'method_metaclass' => \&Class::MOP::Class::method_metaclass }, - init_arg => 'method_metaclass', default => 'Class::MOP::Method', )) ); Class::MOP::Class->meta->add_attribute( - Class::MOP::Attribute->new('$!instance_metaclass' => ( + Class::MOP::Attribute->new('instance_metaclass' => ( reader => { # NOTE: we need to do this in order # for the instance meta-object to @@ -342,7 +335,6 @@ Class::MOP::Class->meta->add_attribute( # rather than re-produce it here 'instance_metaclass' => \&Class::MOP::Class::instance_metaclass }, - init_arg => 'instance_metaclass', default => 'Class::MOP::Instance', )) ); @@ -357,8 +349,7 @@ Class::MOP::Class->meta->add_attribute( ## Class::MOP::Attribute Class::MOP::Attribute->meta->add_attribute( - Class::MOP::Attribute->new('$!name' => ( - init_arg => 'name', + Class::MOP::Attribute->new('name' => ( reader => { # NOTE: we need to do this in order # for the instance meta-object to @@ -372,8 +363,7 @@ Class::MOP::Attribute->meta->add_attribute( ); Class::MOP::Attribute->meta->add_attribute( - Class::MOP::Attribute->new('$!associated_class' => ( - init_arg => 'associated_class', + Class::MOP::Attribute->new('associated_class' => ( reader => { # NOTE: we need to do this in order # for the instance meta-object to @@ -387,115 +377,75 @@ Class::MOP::Attribute->meta->add_attribute( ); Class::MOP::Attribute->meta->add_attribute( - Class::MOP::Attribute->new('$!accessor' => ( - init_arg => 'accessor', + Class::MOP::Attribute->new('accessor' => ( reader => { 'accessor' => \&Class::MOP::Attribute::accessor }, predicate => { 'has_accessor' => \&Class::MOP::Attribute::has_accessor }, )) ); Class::MOP::Attribute->meta->add_attribute( - Class::MOP::Attribute->new('$!reader' => ( - init_arg => 'reader', + Class::MOP::Attribute->new('reader' => ( reader => { 'reader' => \&Class::MOP::Attribute::reader }, predicate => { 'has_reader' => \&Class::MOP::Attribute::has_reader }, )) ); Class::MOP::Attribute->meta->add_attribute( - Class::MOP::Attribute->new('$!initializer' => ( - init_arg => 'initializer', + Class::MOP::Attribute->new('initializer' => ( reader => { 'initializer' => \&Class::MOP::Attribute::initializer }, predicate => { 'has_initializer' => \&Class::MOP::Attribute::has_initializer }, )) ); Class::MOP::Attribute->meta->add_attribute( - Class::MOP::Attribute->new('$!writer' => ( - init_arg => 'writer', + Class::MOP::Attribute->new('writer' => ( reader => { 'writer' => \&Class::MOP::Attribute::writer }, predicate => { 'has_writer' => \&Class::MOP::Attribute::has_writer }, )) ); Class::MOP::Attribute->meta->add_attribute( - Class::MOP::Attribute->new('$!predicate' => ( - init_arg => 'predicate', + Class::MOP::Attribute->new('predicate' => ( reader => { 'predicate' => \&Class::MOP::Attribute::predicate }, predicate => { 'has_predicate' => \&Class::MOP::Attribute::has_predicate }, )) ); Class::MOP::Attribute->meta->add_attribute( - Class::MOP::Attribute->new('$!clearer' => ( - init_arg => 'clearer', + Class::MOP::Attribute->new('clearer' => ( reader => { 'clearer' => \&Class::MOP::Attribute::clearer }, predicate => { 'has_clearer' => \&Class::MOP::Attribute::has_clearer }, )) ); Class::MOP::Attribute->meta->add_attribute( - Class::MOP::Attribute->new('$!builder' => ( - init_arg => 'builder', + Class::MOP::Attribute->new('builder' => ( reader => { 'builder' => \&Class::MOP::Attribute::builder }, predicate => { 'has_builder' => \&Class::MOP::Attribute::has_builder }, )) ); Class::MOP::Attribute->meta->add_attribute( - Class::MOP::Attribute->new('$!init_arg' => ( - init_arg => 'init_arg', + Class::MOP::Attribute->new('init_arg' => ( reader => { 'init_arg' => \&Class::MOP::Attribute::init_arg }, predicate => { 'has_init_arg' => \&Class::MOP::Attribute::has_init_arg }, )) ); Class::MOP::Attribute->meta->add_attribute( - Class::MOP::Attribute->new('$!default' => ( - init_arg => 'default', + Class::MOP::Attribute->new('default' => ( # default has a custom 'reader' method ... predicate => { 'has_default' => \&Class::MOP::Attribute::has_default }, )) ); Class::MOP::Attribute->meta->add_attribute( - Class::MOP::Attribute->new('@!associated_methods' => ( - init_arg => 'associated_methods', + Class::MOP::Attribute->new('associated_methods' => ( reader => { 'associated_methods' => \&Class::MOP::Attribute::associated_methods }, default => sub { [] } )) ); -# NOTE: (meta-circularity) -# This should be one of the last things done -# it will "tie the knot" with Class::MOP::Attribute -# so that it uses the attributes meta-objects -# to construct itself. -Class::MOP::Attribute->meta->add_method('new' => sub { - my $class = shift; - my $name = shift; - my %options = @_; - - (defined $name && $name) - || confess "You must provide a name for the attribute"; - $options{init_arg} = $name - if not exists $options{init_arg}; - - if(exists $options{builder}){ - confess("builder must be a defined scalar value which is a method name") - if ref $options{builder} || !(defined $options{builder}); - confess("Setting both default and builder is not allowed.") - if exists $options{default}; - } else { - (Class::MOP::Attribute::is_default_a_coderef(\%options)) - || confess("References are not allowed as default values, you must ". - "wrap the default of '$name' in a CODE reference (ex: sub { [] } and not [])") - if exists $options{default} && ref $options{default}; - } - # return the new object - $class->meta->new_object(name => $name, %options); -}); - Class::MOP::Attribute->meta->add_method('clone' => sub { my $self = shift; $self->meta->clone_object($self, @_); @@ -503,43 +453,30 @@ Class::MOP::Attribute->meta->add_method('clone' => sub { ## -------------------------------------------------------- ## Class::MOP::Method - Class::MOP::Method->meta->add_attribute( - Class::MOP::Attribute->new('&!body' => ( - init_arg => 'body', + Class::MOP::Attribute->new('body' => ( reader => { 'body' => \&Class::MOP::Method::body }, )) ); Class::MOP::Method->meta->add_attribute( - Class::MOP::Attribute->new('$!package_name' => ( - init_arg => 'package_name', + Class::MOP::Attribute->new('associated_metaclass' => ( + reader => { 'associated_metaclass' => \&Class::MOP::Method::associated_metaclass }, + )) +); + +Class::MOP::Method->meta->add_attribute( + Class::MOP::Attribute->new('package_name' => ( reader => { 'package_name' => \&Class::MOP::Method::package_name }, )) ); Class::MOP::Method->meta->add_attribute( - Class::MOP::Attribute->new('$!name' => ( - init_arg => 'name', + Class::MOP::Attribute->new('name' => ( reader => { 'name' => \&Class::MOP::Method::name }, )) ); -Class::MOP::Method->meta->add_method('wrap' => sub { - my $class = shift; - my $code = shift; - my %options = @_; - - ('CODE' eq (Scalar::Util::reftype($code) || '')) - || confess "You must supply a CODE reference to bless, not (" . ($code || 'undef') . ")"; - - ($options{package_name} && $options{name}) - || confess "You must supply the package_name and name parameters"; - - # return the new object - $class->meta->new_object(body => $code, %options); -}); - Class::MOP::Method->meta->add_method('clone' => sub { my $self = shift; $self->meta->clone_object($self, @_); @@ -554,35 +491,24 @@ Class::MOP::Method->meta->add_method('clone' => sub { # practices of attributes, but we put # it here for completeness Class::MOP::Method::Wrapped->meta->add_attribute( - Class::MOP::Attribute->new('%!modifier_table') + Class::MOP::Attribute->new('modifier_table') ); ## -------------------------------------------------------- ## Class::MOP::Method::Generated Class::MOP::Method::Generated->meta->add_attribute( - Class::MOP::Attribute->new('$!is_inline' => ( - init_arg => 'is_inline', + Class::MOP::Attribute->new('is_inline' => ( reader => { 'is_inline' => \&Class::MOP::Method::Generated::is_inline }, default => 0, )) ); -Class::MOP::Method::Generated->meta->add_method('new' => sub { - my ($class, %options) = @_; - ($options{package_name} && $options{name}) - || confess "You must supply the package_name and name parameters"; - my $self = $class->meta->new_object(%options); - $self->initialize_body; - $self; -}); - ## -------------------------------------------------------- ## Class::MOP::Method::Accessor Class::MOP::Method::Accessor->meta->add_attribute( - Class::MOP::Attribute->new('$!attribute' => ( - init_arg => 'attribute', + Class::MOP::Attribute->new('attribute' => ( reader => { 'associated_attribute' => \&Class::MOP::Method::Accessor::associated_attribute }, @@ -590,48 +516,16 @@ Class::MOP::Method::Accessor->meta->add_attribute( ); Class::MOP::Method::Accessor->meta->add_attribute( - Class::MOP::Attribute->new('$!accessor_type' => ( - init_arg => 'accessor_type', + Class::MOP::Attribute->new('accessor_type' => ( reader => { 'accessor_type' => \&Class::MOP::Method::Accessor::accessor_type }, )) ); -Class::MOP::Method::Accessor->meta->add_method('new' => sub { - my $class = shift; - my %options = @_; - - (exists $options{attribute}) - || confess "You must supply an attribute to construct with"; - - (exists $options{accessor_type}) - || confess "You must supply an accessor_type to construct with"; - - (Scalar::Util::blessed($options{attribute}) && $options{attribute}->isa('Class::MOP::Attribute')) - || confess "You must supply an attribute which is a 'Class::MOP::Attribute' instance"; - - ($options{package_name} && $options{name}) - || confess "You must supply the package_name and name parameters"; - - # return the new object - my $self = $class->meta->new_object(%options); - - # we don't want this creating - # a cycle in the code, if not - # needed - Scalar::Util::weaken($self->{'$!attribute'}); - - $self->initialize_body; - - $self; -}); - - ## -------------------------------------------------------- ## Class::MOP::Method::Constructor Class::MOP::Method::Constructor->meta->add_attribute( - Class::MOP::Attribute->new('%!options' => ( - init_arg => 'options', + Class::MOP::Attribute->new('options' => ( reader => { 'options' => \&Class::MOP::Method::Constructor::options }, @@ -640,38 +534,14 @@ Class::MOP::Method::Constructor->meta->add_attribute( ); Class::MOP::Method::Constructor->meta->add_attribute( - Class::MOP::Attribute->new('$!associated_metaclass' => ( - init_arg => 'metaclass', + Class::MOP::Attribute->new('associated_metaclass' => ( + init_arg => "metaclass", # FIXME alias and rename reader => { 'associated_metaclass' => \&Class::MOP::Method::Constructor::associated_metaclass }, )) ); -Class::MOP::Method::Constructor->meta->add_method('new' => sub { - my $class = shift; - my %options = @_; - - (Scalar::Util::blessed $options{metaclass} && $options{metaclass}->isa('Class::MOP::Class')) - || confess "You must pass a metaclass instance if you want to inline" - if $options{is_inline}; - - ($options{package_name} && $options{name}) - || confess "You must supply the package_name and name parameters"; - - # return the new object - my $self = $class->meta->new_object(%options); - - # we don't want this creating - # a cycle in the code, if not - # needed - Scalar::Util::weaken($self->{'$!associated_metaclass'}); - - $self->initialize_body; - - $self; -}); - ## -------------------------------------------------------- ## Class::MOP::Instance @@ -680,13 +550,46 @@ Class::MOP::Method::Constructor->meta->add_method('new' => sub { # included for completeness Class::MOP::Instance->meta->add_attribute( - Class::MOP::Attribute->new('$!meta') + Class::MOP::Attribute->new('associated_metaclass', + reader => { associated_metaclass => \&Class::MOP::Instance::associated_metaclass }, + ), ); Class::MOP::Instance->meta->add_attribute( - Class::MOP::Attribute->new('@!slots') + Class::MOP::Attribute->new('_class_name', + init_arg => undef, + reader => { _class_name => \&Class::MOP::Instance::_class_name }, + #lazy => 1, # not yet supported by Class::MOP but out our version does it anyway + #default => sub { $_[0]->associated_metaclass->name }, + ), ); +Class::MOP::Instance->meta->add_attribute( + Class::MOP::Attribute->new('attributes', + reader => { attributes => \&Class::MOP::Instance::get_all_attributes }, + ), +); + +Class::MOP::Instance->meta->add_attribute( + Class::MOP::Attribute->new('slots', + reader => { slots => \&Class::MOP::Instance::slots }, + ), +); + +Class::MOP::Instance->meta->add_attribute( + Class::MOP::Attribute->new('slot_hash', + reader => { slot_hash => \&Class::MOP::Instance::slot_hash }, + ), +); + + +# we need the meta instance of the meta instance to be created now, in order +# for the constructor to be able to use it +Class::MOP::Instance->meta->get_meta_instance; + +# pretend the add_method never happenned. it hasn't yet affected anything +undef Class::MOP::Instance->meta->{_package_cache_flag}; + ## -------------------------------------------------------- ## Now close all the Class::MOP::* classes @@ -698,8 +601,10 @@ Class::MOP::Instance->meta->add_attribute( # no actual benefits. $_->meta->make_immutable( - inline_constructor => 0, - inline_accessors => 0, + inline_constructor => 1, + replace_constructor => 1, + constructor_name => "_new", + inline_accessors => 0, ) for qw/ Class::MOP::Package Class::MOP::Module @@ -913,6 +818,11 @@ We set this constant depending on what version perl we are on, this allows us to take advantage of new 5.10 features and stay backwards compat. +=item I + +Whether or not C provides C, a much faster way to get all the +subclasses of a certain class. + =back =head2 Utility functions @@ -958,6 +868,13 @@ If possible, we will load the L module and this will function as C does, otherwise it will just return the C<$code> argument. +=item B + +If L is available, this returns true under global +destruction. + +Otherwise it's a constant returning false. + =back =head2 Metaclass cache functions